html {
  font-size: 14px;
}
@media screen and (max-width: 480px) {
  html {
    font-size: 14px;
  }
}
@media screen and (min-width: 400px) {
  html {
    font-size: 16px;
  }
}
@media screen and (min-width: 540px) {
  html {
    font-size: 18px;
  }
}